Home Inspection Electrical Practice Test

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What device is used to join copper and aluminum wires?

Aluminum splice connector
Copalum parallel splice connector
Wire nut connector
Crimp connector

The correct answer is: Copalum parallel splice connector

The best choice for joining copper and aluminum wires is a Copalum parallel splice connector. This connector is specifically designed to create a safe and reliable connection between dissimilar metals, such as copper and aluminum. It utilizes a unique technology that helps prevent galvanic corrosion, which can occur when copper and aluminum are directly joined. This corrosion can weaken the connection over time, leading to potential electrical failures or hazards. Moreover, the Copalum connector is associated with improved performance and longevity compared to other methods. It is typically used in applications where a strong, long-lasting connection is critical, such as in residential and commercial wiring systems. While other connectors, like wire nuts and crimp connectors, may be suitable for joining similar types of wires, they are not specifically intended for mixed metal connections and may not provide the same level of protection against corrosion and degradation.